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Co-ordinated gene expression during phases of dormancy release in raspberry (Rubus idaeus L.) buds.

Abstract：

:Bud break in raspberry (Rubus idaeus L.) is often poor and uneven, with many of the subapical buds remaining in a dormant state. In order to determine the dormancy status of raspberry buds, an empirical measure of bud burst in a growth-permissive environment following exposure to chilling (4 degrees C cold storage) was developed. For cv. Glen Ample, percentage bud burst in intact canes and isolated nodes was recorded after 14 d. Isolated nodes (a measure of endodormancy) achieved 100% bud burst after approximately 1500 h chilling whereas buds on intact plants (combined endo- and paradormancy) required an additional 1000 h chilling. A microarray approach was used to follow changes in gene expression that occurred during dormancy transition. The probes for the microarrays were obtained from endodormant and paradormant raspberry bud cDNA libraries. The expression profiles of 5300 clones from these libraries were subjected to principal component analysis to determine the most significant expression patterns. Sequence analysis of these clones, in many cases, enabled their functional categorization and the development of hypotheses concerning the mechanisms of bud dormancy release. Thus a set of novel candidates for key dormancy-related genes from raspberry buds have been identified. Bud dormancy is fundamental to the study of plant developmental processes and, in addition, its regulation is of significant economic importance to fruit and horticultural industries.

journal_name

J Exp Bot

journal_title

Journal of experimental botany

authors

Mazzitelli L,Hancock RD,Haupt S,Walker PG,Pont SD,McNicol J,Cardle L,Morris J,Viola R,Brennan R,Hedley PE,Taylor MA

doi

10.1093/jxb/erl266

subject

Has Abstract

pub_date

2007-01-01 00:00:00

pages

1035-45

issue

5

eissn

0022-0957

issn

1460-2431

pii

erl266

journal_volume

58

pub_type

杂志文章

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